Remove obsolete V8_INFINITY macro.

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index 6bbd1a3183a21baba02a4e177e5798b4a3cd95be..892ae2a39a00dd057880127fda8782aa0e32c96a 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <limits>
+
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS64
@@ -851,7 +853,7 @@ void MathPowStub::Generate(MacroAssembler* masm) {
       // double_scratch can be overwritten in the delay slot.
       // Calculates square root of base.  Check for the special case of
       // Math.pow(-Infinity, 0.5) == Infinity (ECMA spec, 15.8.2.13).
-      __ Move(double_scratch, static_cast<double>(-V8_INFINITY));
+      __ Move(double_scratch, std::numeric_limits<double>::infinity());
       __ BranchF(USE_DELAY_SLOT, &done, NULL, eq, double_base, double_scratch);
       __ neg_d(double_result, double_scratch);
 
@@ -871,7 +873,7 @@ void MathPowStub::Generate(MacroAssembler* masm) {
       // double_scratch can be overwritten in the delay slot.
       // Calculates square root of base.  Check for the special case of
       // Math.pow(-Infinity, -0.5) == 0 (ECMA spec, 15.8.2.13).
-      __ Move(double_scratch, static_cast<double>(-V8_INFINITY));
+      __ Move(double_scratch, std::numeric_limits<double>::infinity());
       __ BranchF(USE_DELAY_SLOT, &done, NULL, eq, double_base, double_scratch);
       __ Move(double_result, kDoubleRegZero);